Search Publications
Successive deuteration in low-mass star-forming regions: The case of D2-methanol (CHD2OH) in IRAS 16293-2422
Margulès, Laurent; Drozdovskaya, Maria N.; Jørgensen, Jes K. +3 more
Context. Di-deuterated molecules are observed in the earliest stages of star formation at abundances of a few percent relative to their nondeuterated isotopologs, which is unexpected considering the scarcity of deuterium in the interstellar medium. With sensitive observations leading to the detection of a steadily increasing number of di-deuterate…
A scaled-up planetary system around a supernova progenitor
Quanz, S. P.; Henning, T.; Mayer, L. +24 more
Context. Virtually all known exoplanets reside around stars with M < 2.3 M⊙ either due to the rapid evaporation of the protostellar disks or to selection effects impeding detections around more massive stellar hosts.
Aims: To clarify if this dearth of planets is real or a selection effect, we launched the planet-hunting B-star E…
A CO isotopologue Line Atlas within the Whirlpool galaxy Survey (CLAWS)
Kruijssen, J. M. Diederik; Leroy, Adam K.; Rosolowsky, Erik +24 more
We present the CO isotopologue Line Atlas within the Whirpool galaxy Survey (CLAWS), which is based on an IRAM 30 m large programme that provides a benchmark study of numerous faint CO isotopologues in the millimetre-wavelength regime across the full disc of the nearby grand-design spiral galaxy M 51 (NGC 5194). The survey's core goal is to use th…
COSMOS2020: UV-selected galaxies at z ≥ 7.5
Sanders, D. B.; Ilbert, O.; Kartaltepe, J. S. +16 more
This paper presents a new search for z ≥ 7.5 galaxies using the COSMOS2020 photometric catalogues. Finding galaxies at the reionisation epoch through deep imaging surveys remains observationally challenging. The larger area covered by ground-based surveys such as COSMOS enables the discovery of the brightest galaxies at these high redshifts. Cover…
Characteristics and evolution of sheath and leading edge structures of interplanetary coronal mass ejections in the inner heliosphere based on Helios and Parker Solar Probe observations
Temmer, M.; Bothmer, V.
Context. We investigated the plasma and magnetic field characteristics of the upstream regions of interplanetary coronal mass ejections (ICMEs) and their evolution as function of distance to the Sun in the inner heliosphere. Results are related both to the development of interplanetary shocks, sheath regions, and compressed solar wind plasma ahead…
Prominence eruption observed in He II 304 Å up to >6 R⊙ by EUI/FSI aboard Solar Orbiter
Heinzel, P.; Mierla, M.; Zhukov, A. N. +24 more
Aims: We report observations of a unique, large prominence eruption that was observed in the He II 304 Å passband of the Extreme Ultraviolet Imager/Full Sun Imager telescope aboard Solar Orbiter on 15-16 February 2022.
Methods: Observations from several vantage points - Solar Orbiter, the Solar-Terrestrial Relations Observatory, the Sola…
Hubble Asteroid Hunter. II. Identifying strong gravitational lenses in HST images with crowdsourcing
Bhatawdekar, Rachana; Merín, Bruno; Kruk, Sandor +3 more
Context. The Hubble Space Telescope (HST) archives constitute a rich dataset of high-resolution images to mine for strong gravitational lenses. While many HST programmes specifically target strong lenses, they can also be present by coincidence in other HST observations.
Aims: Our aim is to identify non-targeted strong gravitational lenses, w…
The earliest O-type eclipsing binary in the Small Magellanic Cloud, AzV 476: A comprehensive analysis reveals surprisingly low stellar masses
Hamann, W. -R.; Oskinova, L. M.; Sander, A. A. C. +7 more
Context. Massive stars at low metallicity are among the main feedback agents in the early Universe and in present-day star forming galaxies. When in binaries, these stars are potential progenitors of gravitational-wave events. Knowledge of stellar masses is a prerequisite to understanding evolution and feedback of low-metallicity massive stars.
ShapePipe: A new shape measurement pipeline and weak-lensing application to UNIONS/CFIS data
Mellier, Yannick; Van Waerbeke, Ludovic; Cuillandre, Jean-Charles +17 more
Context. The Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) is an ongoing collaboration that will provide the largest deep photometric survey of the northern sky in four optical bands to date. As part of this collaboration, the Canada-France Imaging Survey (CFIS) is observing r-band data with an average seeing of 0.65 arcsec, which is …
Chemical Evolution of R-process Elements in Stars (CERES). I. Stellar parameters and chemical abundances from Na to Zr
Hanke, Michael; Bonifacio, Piercarlo; Caffau, Elisabetta +10 more
Aims: The Chemical Evolution of R-process Elements in Stars (CERES) project aims to provide a homogeneous analysis of a sample of metal-poor stars ([Fe/H] < -1.5). We present the stellar parameters and the chemical abundances of elements up to Zr for a sample of 52 giant stars.
Methods: We relied on a sample of high signal-to-noise UV…